Then reconfigure the package and it should be recompiled. The next time you start it, it should work instead of creating kernel BUG

Update:

Xvideo actually works better than in Directx video in Windows XP, where I often see blocky video scaling. The CPU usage is not too high, either. Currently it's only working under Ubuntu 9.04 for me. Though I had managed to compile the module with kernel 2.6.30 before, I don't remember how I did that... And I haven't gotten actual video acceleration to work yet.

Of course I'll keep you updated and I'll post a little howto once it's all working. But feel free to ask, anyway. And thanks so much to the person from the Ubuntu bugzilla who helped me to finally get it all working!!!

Update2: Keep checking the page. I will post a link to an archive with a script that will manage the compilation in Ubuntu 9.10. If someone could help me figure out how to, I'd love to create, upload and post a .deb for dkms so it all works automatically... Or ultimately, we could modify the driver to check for the MSI's signature and then skip the edid check.

I've created a package for Karmic that you can use to manually install the driver with the fix already applied: http://www.megaupload.com/?d=BB23R7K2. Extract it and execute the script make_psb.sh, then reboot and try to modprobe psb. Let me know when the 10 downloads run out and it it works for you.

Update3: Here is a step by step howto. It explains setting up X and then VAAPI (hardware video decoding) in Kubuntu 9.10.

to answer myself: it seems as if the tar.bz2 is actually everything that is needed.I just did a clean install of ubuntu 9.10 on my MSI Wind U115 hybrid. When doing a sudo modprobe psb after an install, I can see the following in dmesg:error: psb: no valid msvdx_fw.bin firmware found

The Framebuffer seems to work fine afterwards, but X is broken (I see my mouse pointer moving about 4 times and there is a lot of garbage on the screen, can't really see anything)

you're very welcome. If you want to really get it working, try installing the review&installation guide: http://linux-tipps.blogspot.com/2009/08/msi-wind-u110-linux-review.html.At the bottom it describes how to get X runnig completely. Once that's done, there is also a link how to get VAAPI acceleration working. Please keep in touch and post your results. I'm especially interested how low you can get your power consumption (http://linux-tipps.blogspot.com/2009/12/over-9-hours-of-video-on-battery-with.html) with the U115 (powertop).Good luck and talk to you soon!